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AVIFAUNA 



We received the following specimens: 

 young cT, 11 November 1905, Texel. 

 cf in change, 21 November 1905, Texel. 

 cT in change, 25 December 1905, Texel. 

 9, 16 January 1907, Texel. 

 cf in change, 15 January 1908, Texel. 

 9, 15 January 1908, Texel. 



in change, 27 January 1908, den Helder. 



We have no males in breeding plumage from our country. 



63. Erismatura leucocephala (Scopoli). [StekelstaarteendJ. 



We possess a female, shot 27 November 1874 at Oost- 

 zaan, Noord-Holland (Coll. van Wickevoort Crommelin, 

 259—2). 



64. Merganser merganser (L.). [Groote zaagbek]. 



Though a common winter visitor we received only three 

 examples, two females killed February and November 1906 

 near Nieuwkoop and a male in immature dress, killed 

 February 1906 at Nieuwwetering, Zuid-Holland. 



65. Merganser serrator (L.). [Middelste zaagbek]. 



This species is very common every winter, at the sea- 

 shore as well as on the inland waters. We received 12 

 specimens, females, males in change and males in full dress, 

 killed from November till March. 



66. Mergus alhellus L. [Nonnetje]. 



The smew visits every year the lakes in the vicinity of 

 Leiden, one year in larger number than in the other. On the 

 seashore it is rarer. The Museum received since 1904: 

 2, 13 December 1904, Nieuwkoop. 

 cf in full plumage, 20 January 1905, Kagermeer. 



» » » 10 February 1905, Nieuwkoop. 



» » » 25 February 1905, Leimuiden. 

 9, 6 December 1905, Nieuwkoop. 



Notes from the Leyden IMuseum, Vol. XXX. 



